Adjustable tool-post.



PATENTED JULY 14, 1908.

B. M. W. HANSON.

ADJUSTABLE TOOL POST.

APPLICATION TILED SEPT. 25, 1902.

N0 MODEL.

Inventor B, M. 14 flan/sun Wi/ness as:

mz Ncnms vzruzs co. Pumauma, wuummou a c UNTTEE STATES Patented July14., 1903.

PATENT ()FFICE.

BENGT M. lV. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO. PRATT dzlVHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

ADJUSTABLE TOOL-POST.

SPECIFICATION forming part of Letters Patent N 0. 733,391, dated July14, 1903.

Application filed September 25, 1902. Serial No. 124,777. (No model.)

I) all whmn it 7H/(I/y concern:

Be it known that I, BENGT M. W. HANSON, a citizen of Sweden, and aresident of Hartford, in the county of Hart-ford and State ofConnecticut, have invented certain new and useful Improvements inAdjustable Tool- Posts, of which the following is a full, clear, andexact specification.

This invention relates to improvements in lo tool-posts of the classemployed upon lathes, screw-machines, and other machines of that type,the object being to provide a tool-post which is readily adjustable toobtain the desired height and inclination of the tool with :5 relationto the work and which when adjusted will firmly clamp the tool in itsadjusted position.

The drawings accompanying this specification illustrate two of thesetool-posts for sup- 2o porting two different tools as they are commonlyemployed upon the crossslides of screw-machines.

Figure 1 is a plan view, partly in section, taken on the line 1 1 ofFig. 8, and Fig. 2 is :5 a side View of two of these posts representingthem as arranged to support two tools in proper relation to the oppositesides of a piece of work. Fig. Sis a front view of one of the tool-postsof Figs. 1 and 2 in section taken on the line line 3 8 of Fig. 2. Fig. 4is a side View of one of the tool-posts, showing it adjusted for holdingthe tool at an inclination with its direction of feeding movement.

Tool posts of this class are commonly mounted upon a cross-slide 6, afragment of which is shown in the figures. The work 7, which is held ina rotating chuck, usually turns in the direction indicated by the arrow,the tools 8 and 9 being supported upon oppo- 0 site sides of the work,the front tool 8 facing upwardly, while the rear tool.9 facesdownwardly. The cutting edges 10 and 11 of these tools are usuallyadjusted to the same horizontal plane as the axis of the work. Hence thebody of the rear tool 9 must be higher than that of the front tool 8, asshown in Fig. 2, although the latter tool may also be reversed andlowered to the level of the tool 8 when the work is to be rotated in adirection opposite to that indicated by the arrow. As these tool-postsare alike in construction, although shown to be differently adjusted, adescription of one will suffice for all.

The post consists of an angular body having the base 13, which restsupon the surface of the cross-slide 6 and is provided with a. tongue 15,fitting in the T-shaped slots 16, which extend lengthwise and crosswiseof the slide, and these slots receive the nuts 17, into which bolts 18are screwed after passing them through holes in the base 13. By thisarrangement the tool-bases may be adjusted upon the slides to theirrequired positions. The vertical portions 14 of the post are bored outfrom below in two places to form seats to receive the vertically-slidingtool-supports 19. The upper and lower ends of these supports arecylindrical, fitting their respective bored seats, and from theintermediate portion the arm 20 projects through the slots 21, whichprevent the supports from turning in their seats. The supports areaxially bored and threaded to receive the adj usting-screws 23, whichare passed down through holes from the top of the tool-post and aresuspended by their heads 25, thereby alsosuspending the tool-supports 19adjustably, so that by turning the screws 23 the support may be adjustedvertically.

For convenience of manufacture the inter- 8o mediate portions of eachtool support 19, from which the arm 20 projects, are smaller in diameterthan the cylindrical ends of the support, so that those intermediateportions need not be turned or machined in any way, thus making it asimple matter to turn only the cylindrical ends for fitting the supportsto their respective seats.

Each tool-post is provided with two of the supports 19 and their adjlisting-screws, and each may be adjusted independently of the other tolocate the tool at the proper height and inclination. As a means forclamping the tools readily in their adjustable positions, the tool-postis provided with the boss 26, 5 projecting over the tool, as shown inFig. 3, and provided with the set-screws 27, which are located directlyover the arms 20 of the tool-supports. By loosening these screws thesupports may be raised and lowered and the me tool slid forward or backand readily tightened in its adjusted position.

For the proper cutting of difierent metals it is desirable to adjust theinclination of the tool so as to obtain the proper top rake or clearanceof the tool, as illustrated in Fig. 4,

in which the tool 8 is inclined at the angle so, with the line 28representing the directionot' feed of the tool from the outside of theaXis of the work. The adjustment of the toolsupports and set-screws toobtain this inclination will be already understood from the figure. Inorder to accommodate the varying inclinations of the tool, the supportsare preferably rounded, as shown at 30 in Fig. 4.

Each of the set-screws 27 when clamped upon the tool 8 operates alsothrough that tool to clamp the tool-support 19 tightly in its adjustedposition. Therefore each of those screws performs the double function ofclamping the tool in its support and of clamping that support in theupright, so that neither the tool nor its support can be moved bystrains thrown upon the tool'slide during its work.

I claim as my invention- 1. In combination with atool-post provided witha seat, an adjustable tool-support guided in said seat, and having anarm projecting from the seat for supporting a tool, and

clamping means independent of said support arranged to bear upon thetool and clamp it to the support.

2. In a tool-post the combination of a base,

an upright integral therewith, a plurality of independent supports for atool mounted for vertical adjustment in the upright, independentadjusting-screws for each support, and a cooperating set-screw above andindependently of each support for clamping that support and its tool atone operation.

3. In combination with a tool-post provided with a cylindrical seat, atool-support having a substantially cylindrical body fitting the seat,and having a projecting arm for supporting the tool, and a cooperatingset-screw mounted above the projecting arm at one side of andindependently of the support for clamping the tool and its support at asingle operation.

4. The combination of a tool-post having two vertical cylindrical seats,each having a slot through the side walls of the seats, a toolsupportfor each seat, each having a cylindrical body fitting the seat, and atool-supporting arm projecting through the slot, each tool-support beingprovided with an independent adjusting-screw extending axially throughthe body, and means mounted above and independently of each tool-supportfor clamping the tool and its support at a single operation.

Signed at Hartford, Connecticut, this 16th day of September, 1902.

BENGT M. \V. HANSON.

Witnesses:

H. E. BAILEY, WM. H. Homes.

